Marcasite and Allanite Physical Properties

Marcasite and Allanite Chemical Formula

While comparing Marcasite and Allanite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Marcasite and Allanite chemical formula.

• Chemical formula of Marcasite- FeS 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
>

Marcasite and Allanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Marcasite and Allanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Marcasite and Allanite Optical Properties during the identification of gemstone. Specific gravity of Marcasite is 3.40-4.20 whereas that of Allanite is 3.40-4.20.